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The gradient of the line passing through the points P(4, 5) ...

The gradient of the line passing through the points P(4, 5) and Q(x, 9) is 12. Find the value of x.

A.

-4

B.

0

C.

4

D.

12

Correct answer is D

Gradient=y1y2x1x2

12=594x

12=44x8=4x

x=4+8=12